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FOC | Family List | FOC Vol. 2-3 | Thelypteridaceae | Parathelypteris

23. Parathelypteris nigrescens Ching ex K. H. Shing, Fl. Reipubl. Popularis Sin. 4(1): 321. 1999.

黑叶金星蕨 hei ye jin xing jue

Plants 50-70 cm tall. Rhizomes short and erect, black. Fronds clustered; stipes 20-35 cm, nearly black on proximal part and with spreading grayish white multicellular long acicular hairs, distally castaneous-brown and sparsely pubescent; laminae oblong or narrowly oblong, 30-38 × 12-15 cm, bases not tapering, pinnate-pinnatifid, apices acuminate and pinnatifid; pinnae 15-18 pairs, spreading, alternate, proximal ones sometimes stalked, proximal pair not shortened; middle pinnae lanceolate, slightly falcate, 8-11 × 1.2-1.5 cm, bases truncate, symmetrical, pinnatifid and reaching narrow wings on both sides of costae, apices long acuminate; segments 15-20 pairs, obliquely spreading, narrowly ligulate, 5-7 × 3-3.5 mm, entire along both sides, rounded-obtuse at apices. Veins visible, lateral veins simple, 5 or 6 pairs per segment, proximal pair arising from base of costules. Laminae herbaceous, dark green when dry, or blackish brown, abaxially with sparse short hairs, costae densely pubescent, adaxially along costae with dense short acicular hairs. Sori orbicular, dorsifixed at middle of lateral veins; indusia medium-sized, orbicular-reniform, brown, membranous, separated from each other, entire or occasionally with 1 or 2 hairs, persistent or deciduous.

● Streamsides in valley forests; 1000-1200 m. Guangxi, Yunnan.


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